The first difference is the performance. Rules are extremely slow compared to constraints.
The second difference is that the user cannot turn constraints off, but he/she can SET RULES OFF. I personally avoid rules whenever possible. Charles Parks <[EMAIL PROTECTED]> wrote: >What is the difference between a foreign key and the rule verify a value >exists? > >Can they be used interchangeably? > >Thanks, >Charlie >================================================ >TO SEE MESSAGE POSTING GUIDELINES: >Send a plain text email to [EMAIL PROTECTED] >In the message body, put just two words: INTRO rbase-l >================================================ >TO UNSUBSCRIBE: send a plain text email to [EMAIL PROTECTED] >In the message body, put just two words: UNSUBSCRIBE rbase-l >================================================ >TO SEARCH ARCHIVES: >http://www.mail-archive.com/rbase-l%40sonetmail.com/ > -- Albert Berry Full Time Consultant to PSD Solutions 350 West Hubbard, Suite 210 Chicago, IL 60610 312-828-9253 Ext. 32 __________________________________________________________________ The NEW Netscape 7.0 browser is now available. Upgrade now! http://channels.netscape.com/ns/browsers/download.jsp Get your own FREE, personal Netscape Mail account today at http://webmail.netscape.com/ ================================================ TO SEE MESSAGE POSTING GUIDELINES: Send a plain text email to [EMAIL PROTECTED] In the message body, put just two words: INTRO rbase-l ================================================ TO UNSUBSCRIBE: send a plain text email to [EMAIL PROTECTED] In the message body, put just two words: UNSUBSCRIBE rbase-l ================================================ TO SEARCH ARCHIVES: http://www.mail-archive.com/rbase-l%40sonetmail.com/
